Design and Analysis of Multi-Level Physical-Layer Network Coding for Gaussian Two-Way Relay Channels

In this paper, we propose a multi-level physical-layer network coding (MPLNC) scheme that optimizes the relay performance for both symmetric and asymmetric traffic in a Gaussian two-way relay channel. The proposed MPLNC scheme enables each source to employ multiple linear binary codes for encoding,...

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Vydáno v:	IEEE transactions on communications Ročník 62; číslo 6; s. 1803 - 1817
Hlavní autoři:	Chen, Zhiyong, Xia, Bin, Hu, Zixia, Liu, Hui
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, NY IEEE 01.06.2014 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Applied sciences Binary codes Channels Codes Coding Coding, codes Constellation diagram Decoding Design engineering Encoding Error analysis Errors Exact sciences and technology Information, signal and communications theory Modulation Modulation, demodulation Network coding Networks Relay Relays Signal and communications theory Switching and signalling Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory physical-layer network coding symmetric and asymmetric relaying multilevel coding error exponent Two-way relay channels Performance evaluation Relaying Relay Error probability Labelling Binary code Linear code Modulation Multilevel system Packet switching Multistage method Two channel system Decoding Binary coding Upper bound Relay channel Simulation Network coding Interleaved codes Multilayer network
ISSN:	0090-6778, 1558-0857
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Popis
Shrnutí:	In this paper, we propose a multi-level physical-layer network coding (MPLNC) scheme that optimizes the relay performance for both symmetric and asymmetric traffic in a Gaussian two-way relay channel. The proposed MPLNC scheme enables each source to employ multiple linear binary codes for encoding, one per modulation level, and the relay node to decode superimposed network codewords at each modulation level. We first derive the achievable rate for the transmission of arbitrary constellations and then prove that MPLNC with multistage decoding (MPLNC/MSD) can achieve the achievable rate if binary code rates are properly chosen for both sources. Furthermore, the design criteria for the proposed MPLNC scheme is investigated, which includes the rate design rule and the labeling strategy. Moreover, we derive the error exponent and an upper bound of the overall error probability for MPLNC. Our analysis and simulation results show that MPLNC/MSD has a significant performance advantage in comparison to the existing bit-interleaved coded modulation (BICM)-based PLNC scheme.
Bibliografie:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 content type line 23
ISSN:	0090-6778 1558-0857
DOI:	10.1109/TCOMM.2014.2318052